Many, many years ago, Tim Berners-Lee wrote this page of answers to (genuinely) frequently asked questions he got from school kids working on reports. I absolutely love the clear straightforward language he uses to describe concepts like hypertext, packet switching, and HTTP.
A film about Tim Berners-Lee and the World Wide Web. Details are scarce right now but watch this space.
Tantek shares a fascinating history lesson from Tim Berners-Lee on how the IETF had him change his original nomenclature of UDI—Universal Document Identifier—to what we now use today: URL—Uniform Resource Locator.
TIm Berners-Lee explains what the "graph" part of "social graph" means. I'm still not keen on the term but I really love the idea (although I also disagree about the building blocks required today).
David Smith has written a brilliant overview of how the perception of the Web is converging towards Tim Berners-Lee original vision of a read/write environment.